| 摘要 |
The jaw tubes (6, 10) are axially displaceable, but radially unrotatable relatively to each other. A housing (4) is provided, in which the outer (6) of the two tubes is rotatably located. - Stop components (21, 23, 26, 29) lock the housing to the outer jaw tube. These comprise a draw yoke (21), firmly attached to the other tube (6), with a lock bolt (23). By means of tension components (29, 30), the lock bolt and the yoke are moved axially between a freeing position and one of locking. |
